Resistance grid



Nov. 24, 1931. E. STRANSZKY 1,333,761

RESISTANCE GRID 7 Filed March 19. 1930 ATTORNEY Patented Nov. 24, 1931 STATES PATEN OFFICE mm, STRANSZKY, orswanm,rmsnvam nnsrs'mncn can) -App1ication filed mm 19, 1930. Serial No. 437,119.

This invention relates to a resistance grid and to the method of making the same, the grid being composed of warp and weft members, with the major portions of the weft members formed of resistance wire, the genbars,

eral object of the invention being to provide reinforcing bars which extend parallel to the weft and act to make the grid rigid in the direction of its weft, such reinforcing when necessary or desired, having their ends extending beyond the grid so as to form supporting means for the grid and electrical connections where the reinforcing bars are electrically connected with the weft. wires.

Another object of the invention is to provide. the grid with projections of insulating material on its faces for preventing the grid from contacting members on'which it is placed or which are placed on the grid, these projections being carried by the reinforcing bars or otherwise attached to the Another object of the invention is to provide the grid with a protecting coating of refractory material which acts as a support to the warp.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure I is aplan view, partly diagram matic, of the grid.

Figure 2 is a section on line 2-2 of Figure 1.

cuit formed by the weft wires.

Figure 4 is a fragmentary plan view showing the insulators as formed of blocks and showing a supporting, tab extending from one edge of the grid.

Figure 5 is a diagrammatic plan view show ing the grid provided withfa thermo-couple.

They are woven in the ends of the bars may of the grid, as shown at 6 Figure 3 is a diagrammatic view of the cirbestos or other heat resisting matter. The

grid is provided with a selvedge 5 at each edge.

' In carrying out my invention, I place re- 1 inforcing bars 6 in the grid, these bars extending parallel to the weft members 4 and they act to make the grid rigid transversely or in the direction of the weft members. grid and if deired, the project from the edges to form means for attaching the grid to a supporting member,

and if the bars are electrically connected to the weft members, as shown at 7 in Figure 3, the projecting ends can serve as means for connecting the bars to a source of electric supply. 7

Tubular members 8,. of non-conducting material, may be placed on the bars to prevent the grid from coming in electrical contact with a member on which it is placed or a member placed on'the grid.

One or more of the bars may informed of different metals, as shown at 6" in to form a thermocouple.

Blocks 9, of non-conducting material, may be suitably connected withthe and ex- Figure 5,

tend beyond the faces thereof-so as to prevent the grid contacting the members placed above or below the grid. j 7

Tabs 10 may be connected to the edges of r the grid to provide means for supporting the grid from a supporting member and if desired, these tabs can be electrically connected to the resistance wireand to a source of sup- P y- Y The grit is coated with refractory material, such as a, mixture of silicate basic solution :ontaining English ball clay and silica, and his coating can be replaced by an enamel oating. The silicate coating will be a coniderable support to the warp.

This invention enables resistance grids to ie cheaply manufactured and they have coniderable strength and can be supported on W0 or four sides andby using the projecions of insulating material, there is no dan ;er of 'the grid contacting with members laced on each side of it.

It is thought from the foregoing descripion that the advantages and novel'features If the invention will be readily apparent.

It is to be understood that changes may be nade in the construction and in the combilation and arrangement of the several parts. provided that such changes fall within the :cope of the appended claims.

What I claim is:

1. A resistance grid comprising woven .varp and weft members and the warp memaers composed of non-inflammable material ind the weft members composed of resistance naterial, and reinforcing bars extended be- ;ween the Warp members and extending aarallel with the weft members and project- .ng at one end beyond the weft members to provide supports for the attachment of coniuctors thereto.

2. A resistance grid comprising Woven warp and weft members and the warp memoers composed of non-inflammable material 1nd the weft members composed of resistance material, reinforcing bars extended between he warp members and extending parallel with the weft members and projecting at one and beyond the weft members to provide supports for the attachment of conductors there :0, and-insulating sleeves arranged on the bars and in spacedrelation to prevent the warp and weft members from coming in contact with other objects located adjacent thereto.

In testimony whereof I afiix my signature.

EMIL STRANSZKY. 

